US1854232A - Gas heater - Google Patents

Description

April 19, 1932.

L. 0. SMITH 1,854,232

GAS HEATER Filed Feb. 10,1930 2 Sheets-Sheet l lie?) April 19, 1932. c s n-H 1,854,232

GAS HEATER Filed Feb. 10, 1950 2 Sheets-Sheet 2 Patented Apr. 19, 1932 warren sir-Auras;-

mini QJE'FLQEZ LEQCMSMQITH QE MINNEABOLISLMINNESOTA, ASSIGNOR. TbfiM'l'l-H SYSTEM..HEAT NG (70., OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF IVIINNESQTA GAS HEATER Applicationfiled February 10, 1930. Serial No. 427,222.

My; present invention has for itszobject to provide am efli'cient, economical and. safe-1 gas heater intended forgeneral use but. especial.-. ly'designedfor-use i-n-heating. school rooms and-the like.

To the above end, generally stated, the inyent ionconsists of the novel devices and combinations of devices hereinafter described and defined in-the claims.

' In, the accompanying drawings, which illustratethe invention, like characters-indi cate likepartst-hroughout the several views.

Referring to the drawings:

Fig. 1 is afrontelevation of the improved heater with some parts broken away and: witl-r other parts indicated by broken lines;

Fig. 2 is a view-principally in central trans verse vertical? section;

Fig- 3' is-a horizontalsection taken on the line oiifFig; 2 and- Fi'gs. 4, 5 and G are detail-views partly in plan and partly in horizontal section taken onthe'; lineal-4, 5-5 and 6-6, respectively, Of F-lgk 2.

The numeral 7 indicates an upright cylindrical shell having a closed bottom and top, the latter of which is provided with an aXial vent or outlet 8 onto which the lower end of the smoke pipe 9 is telescoped and which pipe leads to a chimney, not shown.

This shell 7 is provided with an annular base 10 having four circumferentially spaced legs 11 which support said shell and base above the floor. Surrounding the shell 7 concentric therewith is a jacket or casing 12 that is open at its ends and radially spaced from said shell to leave an air space therebetween. This acket 12 is supported on brackets 13 on the base 10 and legs 11 with its uppeer and lower ends substantially in the planes of the corresponding ends of the shell 7 In the front of the jacket 12 is a large door opening normally closed by a horizontal swinging door 14.

WVithin the shell 7 near the bottom thereof is a ring-like gas burner 15 which is substantially square in cross-section and has on its top a multiplicity of bossed gas escape holes 16. Said burner 15 loosely rests on four circumferentially spaced angle brackets 17 secured by nut-equipped bolts18 to the'shell' 7;. The diameter of'theburner 15,-is considerably'less than the shell 7 andleavesan air; passageway. between, said bu ner; and shell. For holdihgthe burner 15 substan,-. tially concentricwith, theshell; 7, with free dom i011 avlimited shift ng; ment t e e n in. a horizontal plane; there are-provided upstanding positioning fingers 19. Thelower; endgportions of the fingers lgextend between the shell, 7, andbrackets 17 and are held in position; by the bolts 18; Said fingers. 19 above the brackets l'? are laterally inset toward the-burner 15 ut. re ut. o ontac therewith to permit, free expansion of said burner. Int-he front of; the casing 7-is a door; opening 20 wh dli extends from the bottom of: said, shell to a; point above the burnerlfi.

A door 21 hinged to the burner 15 normally closes the upper portionof the door-opening 20randiits bottoma is; slightly belowsaid burn: 61".; Form-ed, the door; 21- at the center, thereof: is. an; opening 22. through: ich he burnerlfiimay be lighted. The-b t om portionofthe door openin-g -20-affords a; con- Stantlyopen air intake for i the; burner 15.

A: gas, supplypipe 23.,leacling, from, nysuitablesource Qfs-upply', not shown, extends LlIlGlGIr the jacket; 12 at the-left side thereofand its;up.p..er end is attached-Ito the bnrner 15 and has commun cation therewith ut: WZLIClE of 'the j acketa12 thegas su-pply pipe is provided with. a valve 241 by theuse of; which the s pply. of gas-t0 he mt er 15 ay e: regulated or entirely-g h t fi.

Above the burner 15 is -adeflector25 ingthe, form of an'inverted cone that, isconcen-tric with,the shell 7; andits base-is of a smaller diameter, to leave an, air. passageway between said shell deflector. This deflector 25- is loosely. suspended. by. a pluralityof nutqu pped bolts 26 from the. hell" '2 wh h loosely, extendfthrough holes in angle brackets2'l'holted to the shell 7and lugs 28 formed with the base of the deflector 25*. This methodof suspending the deflector 25irom theshel'l7 permits free expansion and'contraction thereof. In the apex o-ffthe deflector- 25' is, as-show-n, two-air holes 29 for the passageeof airintothedeflector 25* to cause gas collected in said deflector to burn. Vertically spaced above the distributor is a spreader in the form of a horizontal disc loosely held under a plurality of angle brackets 31 secured to the shell 7 by nut-equipped bolts 32 which loosely extend through radial slots 33 in the spreader 30 and brackets 31. By thus loosely suspending the spreader 30 from the shell 7 the same is free to expand and contract thus avoiding warping and buckling thereof.

Above the spreader 30 is a plurality of vertically spaced baflies 34: in the form of flat segmental plates the arcs of which closely engage the shell 7 and angle member 35 rigidly secure said baflles to the shell 7. Those baffles 34 are arranged in the shell 7 with their chords parallel and alternately arranged on opposite sides of said shell. The space between the walls of the shell 7 and cords of the battles 34 form vertically spaced passageways 36 alternately arranged on opposite sides of the shell 7 which cause the products of combustion to travel a long zigzag course in the shell 7 from one side to the other thereof between the baffles 34.

Fresh air fromthe outside of the building is conveyed through an intake conduit to the heater where the same is warmed as it travels upward between the shell 7 and jacket 12 and radiates in all directions into the room. The fresh air intake conduit is only fragmentari lzy illustrated and indicated by the numeral 3 The flame burner gives maximum heat which is directed by the deflector 25 against the walls of the steel shell 7 by said deflector and the spreader 30. From the spreader 30 the heat travels the long course in the shell 7 formed by the baffles 34: which directs the heat alternately against opposite walls of the shell 7 in the passageway 36. At the top of the shell 7 the products of combustion pass through the outlet 8 to the smoke pipe 9 which conveys the same to the chimney and never into the room. Heat from the baffles 34 due to their contact with the shell 7 is transmitted to said shell where the same is radiated into the room. Due to the flame passageway in the shell 7 very little heat will escape through the outlet- 8.

There will be no shortage of oxygen in the room as the burned air passes out through the chimney and warm fresh air is constantly taking its place. The door opening 20 below the door 21 is always open so that there will be an air supply to the gas burner 15 at all times and of the proper volume. This air from the door opening 20 passes upward through the annular burner 15 as well as between said burner and the walls of the shell 7.

The air drawn into the interior of the deflector 25 through the air holes 29 is for the purpose of combustion so that the gases as they accumulate in the deflector 25 are burned and thus prevent explosions.

The door opening 20 which is constantly open affords an efiicient ventilator for the room as the draft produced in the heater by the heat from the burner draws the foul air from the floor and uses the same for the purpose of combustion. Fresh air to replace the foul air drawn from the room through the door opening 20 is replenished by a fresh air intake, not shown.

lVhat I claim is:

1. A heater of the class described comprising a shell, a ring-like burner in the shell, a hollow inverted conical deflector over the burner, a disk-like spreader plate spaced above the deflector, said burner, deflector, and spreader plate being substantially axially aligned at the axis of the shell and spaced from the walls thereof to leave annular air passageways therebetween, said deflector having an open base and an air passageway in its apex, and vertically spaced battles in the shell above the spreader plate.

2. A heater of the class described, comprising a shell, a range-like burner in the shell, an inverted hollow conical deflect-or above the burner and spaced from the wall of the shell, and a spreader in the shell spaced above the deflector for the circulation of air Vertically between the shell and deflector and horizontally between the deflector and spreader, said deflector having in its apex an air passageway and also having an open base, whereby air entering the deflector through its air passageway will cause gases in the deflector to burn.

In testimony whereof I afiix my signature.

LEO C. SMITH.

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